But the 2016 Surface Book has been redesigned "from the outside in", with an additional cooling fan and a pair of hyperbolic cooling fans at back of product to keep the temperature down. That means the latest Intel Core i7 processor on board can work harder without overheating.

Graphics have seen a boost too, doubling the power compared to the original model by using an Nvidia GTX 965M with 2GB RAM. That's some serious power. Microsoft claims it'll mean more than three times the power of the current MacBook Pro 13-inch.

Also inside is a new battery. So when Microsoft claims that the 2016 Surface Book offers a 30 per cent increase in longevity per charge, it's not basing that on software enhancements - it's down to increased capacity. The claim is 16-hours of life per charge.